Malicious PDF — malware analysis report

Static analysis result for SHA-256 c017160134d02941…

MALICIOUS

PDF

85.5 KB Created: 2021-05-10 04:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 89f15d054f7a4bc57f9dfa4292e15ce1 SHA-1: 218840cd39ad1de3d0af3f242d1a4689bdab683f SHA-256: c017160134d02941c96178c61120ffd44d15c5f1c5977df1a962930d424bb66c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a malicious intent to direct users to potentially harmful content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely used for phishing or malware distribution. While no scripts were extracted, the presence of multiple suspicious URLs and the link farm heuristic point towards an attack pattern involving user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=jazzy+select+6+total+weight PDF link annotation
    • https://jilolepileg.weebly.com/uploads/1/3/1/4/131453494/dopufiredikalifaxub.pdfIn PDF document text
    • https://fobinoxibenor.weebly.com/uploads/1/3/1/4/131437242/5114c.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/cyiakij/hierarchy_template_ppt_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/KBhi431/jizajawafov.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/5741308.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/o_significado_dos_versculos_do_alcoro_sagrado.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/arbeitsvertrag_kndigen.pdfIn PDF document text
    • https://tekoboxini.weebly.com/uploads/1/3/0/8/130814877/599bf576d34dbfe.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/sony_a6500_price_in_india_flipkart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_1e19225720fe48a88d439ca62e7be5da.pdf?index=trueIn PDF document text
    • http://rixibebesimi.epizy.com/thermo_king_md_200_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130d3d84-649a-4751-80a8-5307637a64fc/tropic_of_cancer_degrees_latitude.pdfIn PDF document text
    • http://pomolado.epizy.com/how_to_teach_conversational_english_online.pdfIn PDF document text
    • https://8d275f60-8e36-4e70-8574-b6d542a617c4.filesusr.com/ugd/dbf6c2_80f53bce340b4defaf1189b54cc0c837.pdf?index=trueIn PDF document text
    • http://gudanomakorake.epizy.com/49799861790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ae40dc-7b9a-4065-8fe8-06be9b2f6553/75819496537.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_6fb26420037c4190b9fcaac88dd39107.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_68d3b46092c64cbbbdadfbb04c16d30a.pdf?index=trueIn PDF document text
    • http://lunupoxupa.rf.gd/information_technology_manager_education_requirements.pdfIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_b8bd9f1faf3841e991acb2dffc353407.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a3796f-a79d-4aac-828d-12b5c07d539c/lg_steam_washer_error_code_03.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/familia_enterobacterias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52715a31-a7e9-49f6-9ad7-d408674e5ea4/23692843445.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 5352 bytes
SHA-256: 69348bcf9ef7da93acfbd41e2deea6f71c3444e68ba5e818bd760a154f63d772
font_01_sfnt_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 12612 bytes
SHA-256: 88608c7ca278871d70c6053aec685f330c012cfb9ecbb5444e5c18ce5e102487
font_02_sfnt_off0001339f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339F 16088 bytes
SHA-256: 700ff7bf493bf9bab5e7bd19ce07725d6ad682c9ec1bd4c381fbd4d74ba1924a